deps: pnpm/action-setup action to v6 (#381)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/release.yml

@@ -24,7 +24,7 @@ jobs:
           token: ${{ secrets.SEEK_OSS_CI_GITHUB_TOKEN }}
 
       - name: Set up pnpm
-        uses: pnpm/action-setup@v4
+        uses: pnpm/action-setup@0e279bb959325dab635dd2c09392533439d90093 # v6.0.8
 
       - name: Set up Node.js
         uses: actions/setup-node@v6
@@ -58,7 +58,7 @@ jobs:
           token: ${{ secrets.SEEK_OSS_CI_GITHUB_TOKEN }}
 
       - name: Set up pnpm
-        uses: pnpm/action-setup@v4
+        uses: pnpm/action-setup@0e279bb959325dab635dd2c09392533439d90093 # v6.0.8
 
       - name: Set up Node.js
         uses: actions/setup-node@v6

.github/workflows/validate.yml

@@ -24,7 +24,7 @@ jobs:
           git config user.email 34733141+seek-oss-ci@users.noreply.github.com
 
       - name: Set up pnpm
-        uses: pnpm/action-setup@v4
+        uses: pnpm/action-setup@0e279bb959325dab635dd2c09392533439d90093 # v6.0.8
 
       - name: Set up Node.js
         uses: actions/setup-node@v6